---
title: "Broadcast signed Flare transaction"
method: POST
path: "/v3/flare/broadcast"
tags: ["Flare - Tatum API"]
---

# Broadcast signed Flare transaction

`POST /v3/flare/broadcast`

## Request

- Base URL: `https://api.tatum.io`
- URL: `https://api.tatum.io/v3/flare/broadcast`
- Auth: API key in header `x-api-key`

/v3/flare/broadcast

**2 credits per API call**

Broadcast signed transaction to Flare blockchain.

## Query parameters

- `testnetType` 'flare-coston' | 'flare-coston2' | 'flare-songbird'

## Headers

- `x-testnet-type` 'flare-coston' | 'flare-coston2' | 'flare-songbird'

## Request body

- BroadcastWithoutKMS
  - `txData` string, required: Raw signed transaction to be published to network.

## Response `200`

OK

- TransactionHash
  - `txId` string, required: The hash (ID) of the transaction

## Other responses

- `400`: Bad Request
- `401`: Unauthorized. Not valid or inactive subscription key present in the HTTP Header.
- `403`: Forbidden. The request is authenticated, but it is not possible to required perform operation due to logical error or invalid permissions.
- `500`: Internal server error. There was an error on the server during the processing of the request.

---

[API](https://skmtc.dev/tatum/apis/blockchain.md) - [All operations](https://skmtc.dev/tatum/apis/blockchain/llms.txt) - [OpenAPI document](https://skmtc.dev/tatum/apis/blockchain/revisions/f9623a85f420?raw)